Ghost. I have no idea what I'm saying - will it work with a Swedish girl?

It will work; you were using Google there, right? I would change the sentence a bit, but they are able to speak English so do not worry about that, you need to taste the Swedish tradition and they are very liberal when it comes to have fun.

I would say; Går du hela vägen? Are you going the whole way?

The best time to be in Sweden is in May or June, something happens to the Swedish women at spring...they get very BEEEP